An Evaluation of Acid Fluid Loss Additives Retarded Acids, and Acidized Fracture Conductivity

1973 ◽  
Author(s):  
D.E. Nierode ◽  
K.F. Kruk
Keyword(s):  
Fluid Loss ◽  
Fracture Conductivity ◽  
Acid Fluid

scholarly journals Modeling Lost-Circulation into Fractured Formation in Rock Drilling Operations

2021 ◽  
Author(s):  
Rami Albattat ◽  
Hussein Hoteit
Keyword(s):  
Analytical Modeling ◽  
Drilling Fluid ◽  
Fluid Loss ◽  
Fracture Conductivity ◽  
Type Curves ◽  
Bingham Plastic ◽  
Lost Circulation ◽  
Rock Formations ◽  
Solution Methods ◽  
Drilling Operations

Loss of circulation while drilling is a challenging problem that may interrupt drilling operations, reduce efficiency, and increases cost. When a drilled borehole intercepts conductive faults or fractures, lost circulation manifests as a partial or total escape of drilling, workover, or cementing fluids into the surrounding rock formations. Studying drilling fluid loss into a fractured system has been investigated using laboratory experiments, analytical modeling, and numerical simulations. Analytical modeling of fluid flow is a tool that can be quickly deployed to assess lost circulation and perform diagnostics, including leakage rate decline and fracture conductivity. In this chapter, various analytical methods developed to model the flow of non-Newtonian drilling fluid in a fractured medium are discussed. The solution methods are applicable for yield-power-law, including shear-thinning, shear-thickening, and Bingham plastic fluids. Numerical solutions of the Cauchy equation are used to verify the analytical solutions. Type-curves are also described using dimensionless groups. The solution methods are used to estimate the range of fracture conductivity and time-dependent fluid loss rate, and the ultimate total volume of lost fluid. The applicability of the proposed models is demonstrated for several field cases encountering lost circulations.

Effect of proppant deformation and embedment on fracture conductivity after fracturing fluid loss

2019 ◽  
Vol 71 ◽  
pp. 102986 ◽  
Author(s):  
Jiaxiang Xu ◽  
Yunhong Ding ◽  
Lifeng Yang ◽  
Zhe Liu ◽  
Rui Gao ◽  
...  
Keyword(s):  
Fluid Loss ◽  
Fracturing Fluid ◽  
Fracture Conductivity

Synthesis and Characterization of Substituted-Ammonium Humic Acid Fluid Loss Additive for Oil-Based Drilling Fluids

2014 ◽  
Vol 1004-1005 ◽  
pp. 623-626 ◽  
Author(s):  
Cha Ma ◽  
Long Li ◽  
Gang Wang ◽  
Xu Bo Yuan
Keyword(s):  
Humic Acid ◽  
New Product ◽  
Extreme Condition ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Reaction Conditions ◽  
Acid Fluid ◽  
Optimal Reaction ◽  
Fluid Loss Additive

Using widely distributed and cheap lignite as starting material, humic acid was modified by octadecylamine, and a new kind of humic acid acetamide was prepared. The optimal reaction conditions of the humic acid acetamide polymer were obtained through laboratory tests as follow: the ratio of of humic acid and octadecylamine was 1:1.5, the reaction temperature was 150 °C, and the reaction time was 16~18 h. The new product was characterized by IR, and the results showed that this substituted-ammonium humic acid was successfully prepared by reacting parts of carboxyl group of humic acid with octadecylamine. HTHP filtration experiments demonstrated that the substituted-ammonium humic acid had good fluid loss properties. As a result, this substituted-ammonium humic acid polymer is an excellent fluid loss additive, and it could meet the requirement of drilling operation under extreme condition.

Development of Polyglycolic- and Polylactic-Acid Fluid-Loss-Control Materials for Fracturing Fluids

2016 ◽  
Vol 30 (04) ◽  
pp. 295-309 ◽  
Author(s):  
Koichi Yoshimura ◽  
Hitoshi Matsui ◽  
Nobuo Morita
Keyword(s):  
Polylactic Acid ◽  
Fluid Loss ◽  
Fracturing Fluids ◽  
Acid Fluid ◽  
Loss Control

Nano-Proppants for Fracture Conductivity Improvement and Fluid Loss Reduction

2015 ◽  
Author(s):  
Charles C Bose ◽  
Awais Gul ◽  
Brian Fairchild ◽  
Teddy Jones ◽  
Reza Barati
Keyword(s):  
Fluid Loss ◽  
Loss Reduction ◽  
Fracture Conductivity

Application of nanoproppants for fracture conductivity improvement by reducing fluid loss and packing of micro-fractures

2015 ◽  
Vol 27 ◽  
pp. 424-431 ◽  
Author(s):  
Charles C. Bose ◽  
Brian Fairchild ◽  
Teddy Jones ◽  
Awais Gul ◽  
Reza Barati Ghahfarokhi
Keyword(s):  
Fluid Loss ◽  
Fracture Conductivity

Polyelectrolyte Multilayered Nanoparticles as Nanocontainers for Enzyme Breakers During Hydraulic Fracturing Process

2021 ◽  
Author(s):  
Mubarak Muhammad Alhajeri ◽  
Jenn-Tai Liang ◽  
Reza Barati Ghahfarokhi
Keyword(s):  
Controlled Release ◽  
Filter Cake ◽  
Entrapment Efficiency ◽  
High Loading ◽  
Fluid Loss ◽  
Colloidal Structure ◽  
Fracturing Fluid ◽  
Fracture Conductivity ◽  
Polyelectrolyte Solution ◽  
Static Conditions

Abstract In this study, Layer-by-Layer (LbL) assembled polyelectrolyte multilayered nanoparticles were developed as a technique for targeted and controlled release of enzyme breakers. Polyelectrolyte multilayers (PEMs) were assembled by means of alternate electrostatic adsorption of polyanions and polycations using colloidal structure of polyelectrolyte complexes (PECs) as LbL building blocks. High enzyme concentrations were introduced into polyethyleneimine (PEI), a positively charged polyelectrolyte solution, to form an electrostatic PECs with dextran sulfate (DS), a negatively charged polyelectrolyte solution. Under the right concentrations and pH conditions, PEMs were assembled by alternating deposition of PEI with DS solutions at the colloidal structure of PEI-DS complexes. Stability and reproducibility of PEMs were tested over time. This work demonstrates the significance of PEMs as a technique for the targeted and controlled release of enzymes based on their high loading capacity, high capsulation efficiency, and extreme control over enzyme concentration. Entrapment efficiency (EE%) of polyelectrolyte multilayered nanoparticles were evaluated using concentration measurement methods as enzyme viscometric assays. Controlled release of enzyme entrapped within PEMs was sustained over longer time periods (> 18 hours) through reduction in viscosity, and elastic modulus of borate-crosslinked hydroxypropyl guar (HPG). Long-term fracture conductivity tests at 40℃ under closure stresses of 1,000, 2,000, and 4,000 psi revealed high fracture clean-up efficiency for fracturing fluid mixed with enzyme-loaded PEMs nanoparticles. The retained fracture conductivity improvement from 25% to 60% indicates the impact of controlled distribution of nanoparticles in the filter cake and along the entire fracture face as opposed to the randomly dispersed unentrapped enzyme. Retained fracture conductivity was found to be 34% for fluid systems containing conventional enzyme-loaded PECs. Additionally, enzyme-loaded PEMs demonstrated enhanced nanoparticle distribution, high loading and entrapment efficiency, and sustained release of the enzyme. This allows for the addition of higher enzyme concentrations without compromising the fluid properties during a treatment, thereby effectively degrading the concentrated residual gel to a greater extent. Fluid loss properties of polyelectrolyte multilayered nanoparticles were also studied under static conditions using a high-pressure fluid loss cell. A borate-crosslinked HPG mixed with nanoparticles was filtered against core plugs with similar permeabilities. The addition of multilayered nanoparticles into the fracturing fluid was observed to significantly improve the fluid- loss prevention effect. The spurt-loss coefficient values were also determined to cause lower filtrate volume than those with crosslinked base solutions. The PEI-DS complex bridging effects revealed a denser, colored filter cake indicating a relatively homogenous dispersion and properly sized particles in the filter cake.

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